Add spec for before/after fetch hooks

Author: MrMarvin

bundler/spec/plugins/hook_spec.rb

@@ -1,6 +1,79 @@
 # frozen_string_literal: true
 
 RSpec.describe "hook plugins" do
+
+  context "before-and-after-fetch hooks" do
+    before do
+      build_repo2 do
+        build_plugin "fetch-timing-timing-plugin" do |s|
+          s.write "plugins.rb", <<-RUBY
+            @timing_start = nil
+            Bundler::Plugin::API.hook Bundler::Plugin::Events::GEM_BEFORE_FETCH do |spec_install|
+              @timing_start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+              puts "gem \#{spec_install.name} started fetch at \#{@timing_start}"
+            end
+            Bundler::Plugin::API.hook Bundler::Plugin::Events::GEM_AFTER_FETCH do |spec_install|
+              timing_end = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+              puts "gem \#{spec_install.name} took \#{timing_end - @timing_start} to fetch"
+              @timing_start  = nil
+            end
+          RUBY
+        end
+      end
+
+      bundle "plugin install fetch-timing-timing-plugin --source https://gem.repo2"
+    end
+
+    it "runs before and after each rubygem is installed" do
+      install_gemfile <<-G
+        source "https://gem.repo1"
+        gem "rake"
+        gem "myrack"
+      G
+
+      expect(out).to include "gem rake started fetch at"
+      expect(out).to match /gem rake took \d+\.\d+ to fetch/
+      expect(out).to include "gem myrack started fetch at"
+      expect(out).to match /gem myrack took \d+\.\d+ to fetch/
+    end
+  end
+
+  context "before-and-after-git hooks" do
+    before do
+      build_repo2 do
+        build_plugin "fetch-timing-timing-plugin" do |s|
+          s.write "plugins.rb", <<-RUBY
+            @timing_start = nil
+            Bundler::Plugin::API.hook Bundler::Plugin::Events::GIT_BEFORE_FETCH do |spec_install|
+              @timing_start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+              puts "gem \#{spec_install.name} started git fetch/checkout at \#{@timing_start}"
+            end
+            Bundler::Plugin::API.hook Bundler::Plugin::Events::GIT_AFTER_FETCH do |spec_install|
+              timing_end = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+              puts "gem \#{spec_install.name} took \#{timing_end - @timing_start} to fetch"
+              @timing_start  = nil
+            end
+          RUBY
+        end
+      end
+
+      bundle "plugin install fetch-timing-timing-plugin --source https://gem.repo2"
+    end
+
+    it "runs before and after each git source rubygem is installed" do
+      build_git "foo", "1.0", path: lib_path("foo")
+
+      relative_path = lib_path("foo").relative_path_from(bundled_app)
+      install_gemfile <<-G, verbose: true
+        source "https://gem.repo1"
+        gem "foo", :git => "#{relative_path}"
+      G
+
+      expect(out).to include "gem foo started git fetch/checkout at"
+      expect(out).to match /gem foo took \d+\.\d+ to fetch/
+    end
+  end
+
   context "before-install-all hook" do
     before do
       build_repo2 do